BI-RADS categories of screening mammography and their management
| Categories | Assessment | Recommendation | Risk of malignancy |
|---|---|---|---|
| 0 | Incomplete | Diagnostic imaging or comparison films needed | Not applicable |
| 1 | Negative | Routine screening | Essentially 0% |
| 2 | Benign | Routine screening | Essentially 0% |
| 3 | Probably benign | Follow up at 6 months | > 0% but ≤ 2% |
| 4 | Suspicious | Biopsy | |
| a = low | 4a > 2% to ≤ 10% | ||
| b = moderate | 4b > 10% to ≤ 50% | ||
| c = high | 4c > 50% to ≤ 95% | ||
| 5 | Highly suspicious | Biopsy | ≤ 95% |
| 6 | Known cancer | Treatment, as appropriate | Not applicable |
BI-RADS = Breast Imaging Reporting and Data System
Based on information in reference 23.